There are
338 mi
from Walnut Creek, CA to Klamath Falls, OR
That's the driving distance. It would take 6 hours 20 mins to go from Walnut Creek, California to Klamath Falls, Oregon.
The flight distance (direct flight from Walnut Creek, CA to Klamath Falls, OR) is 298.76 mi.
338 mi = 544.67 kms